DIY Video Projector Part II

[prjctr_builder]

Here's the stuff that i got so far...

fans: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3419642172

surface mirror: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2642537846

bulb: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2540947213

ballast: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2539443907


omg, $80... and i did not even start building a reflector...

ACE... could you tutor me on HOW TO MAKE A PERFECT REFLECTOR? i know it should be parabolic, but what shape?

thanks guys

good luck all

P.S. my dad will kill me when he sees his credit card bill in the end of the month...

[ace3000_1]

ya i will soon but right now im run off of my feet with work


trev

[rmccoll]

This is my third projector I've build with this LCD and I'm finally getting every thing together it's a really simple design but it's somethng to start out with. My first two designs were for front projection, now I'm trying a rear projection, because all outside light is almost stopped, your light would'nt have to be as bright and since most of the other projectors build by other people have been huge it's best that the size of it be for a reason.

Like I said my projector is simple it's just the Sony Psone LCD I believe the res. is 960X230 something I don't a thing about contrast ratio or respond time, but it shows fine to me, the controller is almost out of the way, it's connected to the lcd by a short ribbon cable it's at a 90 degree angle from the lcd. My light source is a 75 watt halogen bulb, it can for about an hour and a half before getting a hot spot, I haven't yet added a fan, but I'm going to buy a huge fan and hook it to my projector via a tube so it can blow air into and keep really cool.

My lense has a low focal length is 125mm so it's close to the lcd, it's not in the picture.

I'm not trying to be rude, but the people who are asking where can they buy a cheap 14 to 15 inch lcds, stop being so cheap your going spend money doing this project, lcd are still relatively new so the price it'snt going to drop anytime so,as you can see prjctr_builder has already spent $80 on his setup and he hasn't bought his lcd, so open your wallets a little bit.

[prjctr_builder]

why is it that for the past few weeks, no one is posting ANYTHING? did you guys give up?

[declined]

OK, maybe I mentioned this before, maybe not, but my LCD kinda broke: 1/3rd of the image is totally messed up. I dunno why but the colors and pixels seem to "bleed" into each other in that part. Does anyone know why this is or how i can fix this?

Anyway: I was kinda pissed off because it was a pretty good lcd (although it was "only" a car-lcd) Who said in-car lcd's aren't good enough for projector-building?? I think its just fine as long as you dont make the image too large.

As a reaction to my lcd-breaking I started designing and building my "crap-projector". This is a design with all my left-over parts. My second, more or less scratched lense, 2 plastic magnifying-reading-fresnels, a crappy playstation "psone" lcd, a 50Watt halogen mini-spot and some left over bits of wood i had lying around in the basement. Needless to say this is no HDTV-hi-quality-DVD-theatre-setup but the tests showed a nice evenly lit watchable image. Not very bright, but enough in a dark room.

One thing was kinda remarkable: i normally use a 500Watt halogen worklight as testlamp but this small 50Watt minispot seems to be only a bit less bright!! I guess it's because it focuses the light and the 500W spreads it all over the place.

Well anyway: i made some pics during the building process but i forgot the camera at home (i'm in my dorm now) so pics will follow (in a few weeks because im leavingto Spain&Portugal tomorrow )

I'll post here as soon as i return!
PS: crappy parts DO work in a PJsetup not super, but it does the trick more or less

[declined]

Oh yea: i do not intend to watch dvd's through this setup: i have plans for my big PJ which will be high quality... (if all goes well)
I will forget about the in-car lcd and buy a pc-lcd-monitor. I do NOT want to use a pc every time i use my PJ so i'll get a VGA box asap (and if the price is right)
I dunno if there's a thread which shows al usable lcd monitors, but i'll check in a minute. If not: what are the perfect lcd monitors? besides this "benq"-type i heard of?

[slize]

after i've finished my first projector, me is gonna make a new one; me is planning to use a panel with 1280x1024 pixels which is sxga!!! gonna built in in my vacations...

some points;

rear projection
sxga resolution
compact
portable

price about

350$

[sgdvd]

i have read many posts on here but none are simple plans, all require dissassembly of a lcd screen- how hard is this without ruining it, and also keeping all the connections-s-video, component etc...?(i would use the psone screen).

saw this plan but after reading many of the posts in this thread and the last one i reckon it wouldn't be very good, but much easier as i dont need to take apart the lcd screen?

please reply.

[slize]

here is tft minitor i just bought for my new projector

http://cgi.ebay.de/ws/eBayISAPI.dll?...ory=19546&rd=1

[davneil]

http://cgi.ebay.com/ws/eBayISAPI.dll...ory=26219&rd=1